Air valve



April 2, 1935. A. 'A. HAAS AIR VALVE Filed Sept. 15, 1954 9. w a 69 z 3 z M m w 4 4 A yr l 4 7% 5 7 9 m u r M M a April 2, 1935.

A. A. HAAS AIR VALVE 2 Sheets-Sheet 2 Filed Sept. 15, 1954 I 4 3 4 I w 4 m w M 6 9 4 4 B 5 6 9 4 a a z .z 4 a z 5 4 Patented Apr. 2, 1935 I Q in i v I UNITED STATES PATENT OFFICE V AIR vALvE 'Alb ert A. Haas; Macon, Ga.

Application Septcmber 15,1934,SerialNo.74 1,215 3 Claims. 152-912) This invention relates to air valves and more Thevalve stem It! has a bore l2 extending lonparticularly to a dust and dirt proof air valve for gitudinallyv therethrough and an enlarged bore use with pneumatic tubes or other pressure de- "M isprovided adjacent the outer end of the stem vices. v I I0 and in'this borejM, the conventional valve in- 5 An object of this invention is to provide animsides are adapted tobe positioned. l-Iowever; in ,5

proved type of air valve which is adapted to take t e pr s instance; the Valve insides are the place of the conventional valve insides at moved and in order to retain pressure in the conpresent in use in valve stems,'and which is so com trainer or tube T, I have provided an air valve structed as to eliminate the necessity of caps over structurecomp is n e Caper housing i Which is the valve stems while at the same time preventing threaded onto the reduCe ppnd p r n i6 10 entrance of dust or dirt into the interior of the 0f the VaiiVe t This D or ho s stem. v in the present instance, knurledor serrated, as

Another object of this invention is to provide a at I1, 50 as to facilitateihe manual n in device of this kind which is exceedingly simple in removal of the-housing from th s m 0.

15 construction and which may be easily and cheap- The housing iiiihals bore therein and a 15.

ly manufactured. g cylindrical member I9 is disposed within this A further object of thisinvention is to provide e e, andin the p e instance, the'bore I8 s 'a valve structure of this kind which is held in en ar ed, ass so as to p ovide a u d r o closed position by the pressure withi th it b seat for a flange 2| integralwith the cylindrical y 20 or container and which may be moved into open member 20. .The innerend 2 0f he cylindrical 2Q position by movement of the dust and dirt pree b '1 is Closed and a bore is Provided venting member inwardly'of the device, axially of the closed end 22 to slidably receive a The above and various other objects and ad valvestem o guide be Theclosed end vantages of this invention will in part be de- 22 of the'housing-or cylindrical. member I!) has a 25 scribed and in part be understood from the foltapered valve seat 25 against which a yi a e 25 lowing detailed description of the present prevalve member 26 of tapered construction engages. ferred embodiment, the same being illustrated in This valve member 26 is secured asby a screw or the accompanying drawings wherein: other attaching means 21 to the inner end of the Figure l is a longitudinal section partly in destem 26, and preferably a metal plate 28 is inter- 30 tail of a conventional valve stem and valve stem posed between the head ofthe screw. 21 and the 30 cap having a device constructed inaccordan'ce inner end of the valve 26. i

with my invention, mounted thereon. The bottom or inner end of the member I9 is r Figure 2 is an enlarged sectional view taken also provided with a plurality of air. passages29 I on the line 2-2 of Figure 1. g extending laterally of the bore, 23, so that. air Figure 3 is a fragmentary sectional view taken may pass by. the stem 24 when the valve 26 is in 35 on the line 3--3 of Figure 2. open position. The housing or cylindrical mem- Figure 4 is a fragmentary sectional view taken her l9 has a piston 30 slidable therein and "this onthe line 4-4 of Figure 2. I piston'3li has a peripheral groove intermediate Figure 5 is a vertical section partly in detail the upper and lower ends thereof, as shown in 40 ofthe operating piston for the air valve. Figure '5, in which a ring or sealing member 3! is 40.

tion. of a modified form of valve stem. or housing, IS. The piston 30 is secured to the Figure 7 is an enlarged-sectional view taken reduced upper endportion 32 oi the stem 24', on the line 1-1 of Figure 6. being held by means of a lock nut 33. .Prefer- Figure 6 is a detail side elevation partly in secdisposed so as to'seal the piston 30 in the cylinder I Referring to the drawin he l tter 'T desig ably,--the.lower or inner side of the piston 30 has 45 names generally a tube or" container for receiving a plurality of lugs 34 secured thereto or made air or other liquid under pressure, and the numerintegral, th r with, I

al Hi designates a conventional valve stem which The cylinder l9;adjacent the inner end thereof is secured in any desired manner tothe tube or isprovided with a plurality of air passages 35,

container T. A shield or capllis disposed about so that when the cylinder 30 moves inwardly to 5.0

t e ste 10 a s lemevably ounted on a rim a position opposite the air passages 35, air may nut Which is threaded o t p p e y of freelypass through these passages 35 and then the stem 13. This construction is conventional down through the air passages 29. and past the and is here shown as merely One application of valveZE into. the tube or container T. The lugs the air valve structure to be hereinafter described, 34 prevent th i t fr contacting with the 55 fiat upper surface of the inner end 22 so that an tapered passage or bore 38 providing a tapered seat which is engaged by a tapered plug or dust and dirt preventing member, generally designated This tapered member 39 has a bore or axial opening 40 therein in which is received the upper end of the reduced stem portion -32 and in addition thereto, an expanding spring 4| is partially disposed inthe opening 40 and engagesloosely about thereduced stem portion 32.and acts to constantly urge the plug 39 into closed position. The inner end of the spring 4| engages the top of theplate 36. v

The inner end of the member [9 has a recess '42 in which is received a gasket 43 and this gasket 43 has a retaining flanged ring or annulus '44 to prevent inward distortion of the gasket 43, which inward distortion might tend to prevent free movement of the valve member 26 into open or closedposition. The gasket 43 is adapted to engage the top of the reduced stem portion 15 so asjto seal the housing [5 on the outer end of the valve stem member 10.

In the embodiment shown in Figures 6 and 7, the stem 10 has a threaded inner portion 45' and an enlarged rib or flange 46 so that the stem 10 may be secured to a conventional container suchas a flexible tube or the like. The outer portion'of the stem ID has a cylindrical housing 41 integral therewith and a 7 cylinder I3 is mounted within this housing 4'1.

The cylinder I3 is similar in construction to the cylinder I9, being provided with air passages 35 adjacent the inner end of the cylinder I 3 and also with air passages 23 extending laterally of the opening 23' for the valve stem member 24'. A yieldable valve member 26 is secured to the inner end of the valve stem 24' and a: piston 30' is sec'ured to the stem 24" in the same manner as the piston 30.

A cushioning for sealing member 43. is carried by the inner end of the cylindrical member i9 andsealsthe eylin'dricalmember .or housing IS in the housing 41'. "A perforate plate 36 engages the upper end of the cylinder 19 and. a threaded plug 48 is threaded into the upper end of the housing QI and fixedly holds the cylinder I 9 within the housing 41. V jj Th'eplugfi fl has a'reduced extension 49 extending upwardly therefrom and this extension 49, together with, the body of the plug 48, hasa tapered bore or passage 33' forming a seat for a valve plug 39?; similar to the plug 38. A spring 4|, is disposed about the reduced stem portion 32 and at one 'end engages against thev top of the plate 36 and extends into a passage 43'. in the plug 39. so as to constantly urge this valve plug 39' into closed position.

' In the use an operation of the air valve hereinbefore described,- where the valve'is mounted on a conventional valve stem l0,.the conventional valve insides are removed and the cap or housing ill is threaded onto the reduced portion [6 of the stem It. When it is desired to place air or other liquid in the tube or container [0, the pressure device is applied to the plug [8 and this plug I9 is manually forced inwardly so as to unseat this plug 39 and at the same time, the outer or upper end of the reduced stem portion 32 is engaged by the plug 39 and the stem 32, together with the piston 38 and the valve 25 moved inwardly until the piston 38 uncovers the air passages 35. At this time, the valve 25 is in open position and the air or other liquid may then freely pass through the housing l 5 and into the stern l8 and the container T. The amount of pressure can also be tested by applying the gauge to the plug 39 which will 'force the piston 33 inwardly and move the valve 28 into partially open position so that air or other liquid may freely move outwardly to cause the gauge to register the pressure in the container T.

It will be apparent from the foregoing that the valve 26 is held in closed position by the pressure in the tube or container T and initially the valve 26 is moved into partly closed position by the pressure engaging the piston 30 and acting to force thispiston 30 outwardly until the periphery of the piston 30 moves beyond the air passages 35 and at this time, the valve 26 will also be in closed position on the seat 25.

e What is claimed is:

1. An air valve, comprising a housing, a cylinder in the housing, a wall on the inner end of the cylinder provided with an opening therethrough andvhaving a valve seaton the imier end of the opening, said cylinder having an air passage in the wall thereof adjacent the inner end of the cylinder, a valve member, a piston slidable in the cylinder and having a length less than the length of the air passage whereby to permit the movement of air past said piston when said piston is adjacent the inner end of the cylinder, a connecting member connecting the valve with the piston for movement therewith, said first named wall havingan air passage laterally of said opening whereby the air pressure against the inner side of the piston will move said piston and valve to closed position, a closure member outwardly of said piston, a spring constantly urging said closure member to closed position, and means engageable with said closure member and said piston for moving said piston to open position simultaneously with the movement of the closure member to open position.

2. An air valve, comprising a housing having a threaded bore adjacent one end thereof and provided with a tapered opening adjacent the other end thereof, an inner housing disposed in said first housing, a cylinder in said inner housing, said inner housing having an inner wall provided with an axial opening communicating with the cylinder, a valve seat in said wall, a valve for said seat, said cylinder having a plurality of laterally disposed air passages adjacent the inner end thereof, a piston slidable in said cylinder and having a length less than the length of'the air passages whereby upon movement of said piston adjacent the inner end of the cylinder air may pass about the periphery of said piston, lugs on the inner face of said piston to limit the inward movement of saidpiston, a tapered plug disposed in said tapered opening of said first housing, a spring constantly urging said plug to closed position, and a member secured to said piston and extending in the direction of said plug whereby to move said .piston to open position upon inward movement of said plug.

3. An air valve, comprising an outer housing of substantially cylindrical construction, an inner housing, a cylinder in said inner housing, an inner end wall carried by said inner housing provided with an axial opening therethrough, a valve seat in said end wall on theinner side thereof, a valve for said seat, said cylinders having a plurality of laterally disposed air passages adjacent the inner ery of said piston when said piston is adjacent the inner end of the cylinder, lugs limiting the inward movement of the piston; a perforate guide plate engaging the outer end of the cylinder and provided .with an axial opening, 'a stem secured to said piston and extending through said opening of said plate, a plug threaded into the outer end of said outer housing, saidplug having a tapered axial opening therethrough; a tapered closure of said plate, a plug threaded into the outer endengaging against the outer end of said stem, and

a spring disposed about the stem constantly urging said closure to closed position.

ALBERT A. HAAS. 

